Cyclohexylfulvene → (1-Methyl-1-cyclohexyl)cyclopentadiene

HRID 495728Notes

Reaction equation

HRID 495728 reaction equation
[CH:1]1([C:7]2[C:11](=C)[CH:10]=[CH:9][CH:8]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[CH3:13][Li]>C1COCC1.CCOCC.O>[CH3:13][C:1]1([C:7]2[CH2:11][CH:10]=[CH:9][CH:8]=2)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6]1

Participants

6

Reactant 2

HCID 22327799CyclohexylfulveneHCID 178418348HCID 178418348, compound

Product 1

HCID 14688277(1-Methyl-1-cyclohexyl)cyclopentadieneYield 38%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 3283Diethyl EtherSolvent2×HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 6.50 g (44.5 mmol) of cyclohexylfulvene in 60 ml of THF, 44.8 ml (51.1 mmol) of an ether solution of methyllithium was dropwise added in a nitrogen atmosphere with ice cooling, followed by stirring at room temperature for one night. After the reaction solution was diluted with 100 ml of ether, 30 ml of water was added. The separated organic phase was washed with water and a saturated saline solution, then dried over magnesium sulfate and filtered. From the filtrate, the solvent was removed under reduced pressure to obtain a liquid. The liquid was isolated and purified by column chromatography (silica gel, developing solvent: hexane) to obtain 2.72 g (16.76 mmol) of a colorless transparent liquid (yield: 38%). The analyzed values are given below.

Workup

  1. additionwas added
  2. washThe separated organic phase was washed with water
  3. dry with materiala saturated saline solution, then dried over magnesium sulfate
  4. filtrationfiltered
  5. customFrom the filtrate, the solvent was removed under reduced pressure
  6. customto obtain a liquid
  7. customThe liquid was isolated
  8. custompurified by column chromatography (silica gel, developing solvent: hexane)

Sources & evidence

ORD record
ord-7202865414d34b25bc2531414c12a9be
Source dataset
uspto-grants-2005_09
Patent number
US06939928B1

Reaction notes

Loading…